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2025-12-10 - 15:55
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rack6slot0.osadl.org (updated Wed Dec 10, 2025 13:01:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
253389927828,234cyclictest0-21swapper/2907:40:1922
253389927828,234cyclictest0-21swapper/2907:40:1922
253389926832,215cyclictest24378-21TaskSchedulerSi11:40:1922
253389926832,215cyclictest24378-21TaskSchedulerSi11:40:1822
253389925221,209cyclictest0-21swapper/2908:25:2022
253389925221,209cyclictest0-21swapper/2908:25:1922
25338992484,230cyclictest0-21swapper/2909:45:2022
25338992484,230cyclictest0-21swapper/2909:45:2022
25338992484,230cyclictest0-21swapper/2909:45:2022
25338992484,230cyclictest0-21swapper/2909:45:2022
253389924221,206cyclictest36794-21nfsd10:35:1922
253389924221,206cyclictest36794-21nfsd10:35:1922
253389924221,206cyclictest36794-21nfsd10:35:1922
253389923450,164cyclictest0-21swapper/2909:10:1822
253389923450,164cyclictest0-21swapper/2909:10:1822
2537499222209,5cyclictest0-21swapper/3912:25:1933
2537499222209,5cyclictest0-21swapper/3912:25:1833
2537499222209,5cyclictest0-21swapper/3912:25:1833
25368992220,219cyclictest39207-21NetworkChangeNo07:25:1929
25368992220,219cyclictest39207-21NetworkChangeNo07:25:1929
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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